Prokaryotic cells lack membrane-bound organelles, so they do not have many of the structures found in eukaryotic cells. However, they do possess the following structures:

* Cell membrane: The cell membrane is a phospholipid bilayer that surrounds the cell and controls the movement of materials into and out of the cell.

* Cytoplasm: The cytoplasm is the gel-like substance that fills the cell and contains all of the cell's organelles.

* Ribosomes: Ribosomes are the organelles that produce proteins.

* DNA: DNA is the molecule that stores the cell's genetic information.

* Plasmid: Plasmids are small, circular DNA molecules that carry genes that are not essential for growth.

* Flagellum and Pili: Flagellum are long, whip-like structures that help the cell move. Pili are short, hair-like structures that help the cell attach to surfaces.

* Capsule: Some prokaryotic cells have a capsule, which is a sticky layer of polysaccharides that surrounds the cell and helps protect it from the environment.

* Glycocalyx: Glycocalyx is a layer of carbohydrates that coats the outside of the cell membrane and is responsible for cell adhesion and protection.

* Inclusion bodies: Inclusion bodies are structures that store nutrients and other materials.